JP2012086752A - Connecting structure of torque rod and connecting method of torque rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure of the torque rod which can reduce the quantity of the component for connection without spoiling the assembling workability to the connecting member.SOLUTION: This connecting structure of the torque rod is a connecting structure of the torque rod which connects one side of the elastic member 3b, 3c prepared in both ends to the oscillation generating side member and another side to the oscillating transfer side member respectively. As to the outside profile line of the elastic member 3c which is either of two elastic members, the plug opening 2c of the elastic member 3c is formed in the connection side member which connects the elastic member 3c, while making different the vertical and horizontal maximum size mutually in the front vision from the shaft end extension. In the posture to turn and displace 90° the elastic member 3c inserted from the plug opening 2c around the axial line of the torque rod 3, the elastic member 3c is engaged between a pair of nip member, which is provided with the shorter dimension than the longer dimension of the maximum vertical and horizontal dimension of the connection side member, under the compression deformation.

Description

  The present invention relates to a torque rod for suppressing vibration to a vehicle body side member of, for example, an automobile engine, and in particular, one of elastic members provided at both ends is used as a member on the engine (vibration generating portion) side. The other relates to a connecting structure of torque rods connected to suspension members (vibration transmission side members), respectively, and a connecting method of torque rods using this connecting structure.

  For example, various parts used in automobiles are required to reduce the number of parts and to simplify the structure of necessary parts in order to keep costs down. There are no exceptions regarding the torque rods mounted between the two. Here, as one of the techniques for simplifying the torque rod, for example, as described in Patent Document 1, a first bush having a small diameter and a second bush having a large diameter are combined with an upper bracket and a lower bracket. It is known that the number of parts constituting the torque rod is reduced by being clamped and fixed with metal fittings.

JP 2008-249113 A

  By the way, in the above torque rod, the first bush and the second bush are formed by vulcanizing and bonding a rubber elastic body around the inner cylinder, and a fastening member such as a bolt is inserted into each inner cylinder so that the torque rod and the suspension are inserted. In order to meet the demand for further cost reduction, a new connection structure that does not use an inner cylinder or a fastening member is necessary. Although it is also considered to reduce the number of parts by incorporating the torque rod into the suspension member in advance, when assembling the vehicle body member, etc., align the engine with the suspension member to which the torque rod is attached. Therefore, there is a concern that this assembly will be difficult, and therefore the appearance of a new torque rod and a connecting structure of this torque rod that can reduce the cost without impairing workability is eagerly desired. It was rare.

  It is an object of the present invention to impair the assembly workability of a vehicle body member or the like with respect to a torque rod that is connected with one of elastic members provided at both ends to a vibration generation side member and the other to a vibration transmission side member. Furthermore, another object of the present invention is to provide a new torque rod connection structure and a torque rod connection method using the connection structure, which can reduce the number of parts required for the connection.

  The present invention is a torque rod connecting structure in which one of elastic members provided at both ends is connected to a vibration generating side member and the other is connected to a vibration transmitting side member, and is arranged on the axis of the torque rod. The vertical and horizontal maximum dimensions of the outer contour line of either one of the two elastic members provided in the front view from the shaft end side are made different from each other, and the elastic member is connected to the connecting side member connecting the elastic members. An insertion opening of a member is provided, and the elastic member inserted through the insertion opening is rotated by 90 ° around the axis of the torque rod, and the elastic member is connected to the longitudinal side of the connection side member. A torque rod coupling structure in which a pair of holding members provided at a shorter interval than the long side dimension of the maximum lateral dimension is engaged under compression deformation.

  Here, preferably, a rigid support member is embedded in the elastic member having different vertical and horizontal maximum dimensions.

  Preferably, the insertion opening is provided with an edge portion serving as a stopper for engaging with the elastic member having the maximum vertical and horizontal dimensions in a rotationally displaced torque rod posture.

  The torque rod connecting method according to the present invention uses any one of the torque rod connecting structures described above, and an elastic member having the maximum vertical and horizontal dimensions of the torque rod is divided into an opening width and an opening. It is inserted into the insertion opening having a dimensional difference with respect to the length, and then the torque rod is rotated by 90 ° around the axis, so that the elastic member is subjected to compression change between the clamping members. In engagement.

  In the connecting structure of the torque rod of the present invention, the outer contour line of the elastic member disposed on the axis of the torque rod is a shaft having a rectangular contour shape, a rhombus contour shape, an elliptical contour shape, an oval contour shape, or the like. The maximum vertical and horizontal dimensions in front view from the end side are different from each other, and after inserting this elastic member from the insertion opening provided in the connection side member, it is rotated 90 ° around the axis of the torque rod Since the elastic member is compressed and deformed between the pair of clamping members provided on the connecting side member by being displaced, the connecting operation of the torque rod to the connecting side member is extremely simple and quick. This can be performed, and a special fastening member for connection is not required, and the connection cost can be reduced.

  In addition, when a rigid support member is embedded in an elastic member having different vertical and horizontal maximum dimensions, when the torque rod is rotated, the elastic member is deformed in a direction opposite to the rotating direction. Since it is restrained by the rigid support member, the elastic member can be easily rotated and displaced in a required direction. In this case, by changing the length and width in which the rigid support member is embedded, the rigidity of the elastic member and thus the amount of deformation can be adjusted, so that the adjustment of the spring constant of the torque rod is facilitated.

  Further, when the edge of the connection side member that is engaged with the elastic member and serves as a stopper is provided in the insertion opening of the connection side member, it is possible to more reliably prevent the torque rod from being pulled out from the connection side member. it can.

  In the connection method of the present invention, when the torque rod is connected to the connection side member using the connection structure described above, the elastic member of the torque rod is aligned with the insertion opening in the opening. Then, the torque rod is rotated by 90 ° around the axis, and the elastic member is engaged between the clamping members under a compression change. And the attachment operation | work with respect to a connection side member can be performed easily.

It is a rough-line perspective view which shows the application state of the connection structure of the torque rod according to this invention. It is a perspective view of the torque rod shown in FIG. It is the front view seen from the axial end side of the torque rod of the elastic member provided in the torque rod shown in FIG. It is an enlarged arrow view seen from the arrow A shown in FIG. 1, (a) is a figure which shows the state at the time of insertion to an insertion opening of an elastic member, (b) is a figure of (a). It is a figure which shows the state which rotated the elastic member 90 degrees around the axis line of the torque rod from the state. It is a disassembled perspective view which shows other embodiment of the connection structure of the torque rod according to this invention. FIG. 6 is a longitudinal sectional view of the plates 4 a and 4 b shown in FIG. 5, (a) is a sectional view taken along line BB of the plate 4 a, and (b) is a sectional view taken along line CC of the plate 4 b. illustrates with elastic member 3c _2.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. It is assumed that the torque rod shown in the drawing extends in a horizontal plane, the extending direction of the axis of the torque rod is defined as the X direction, the horizontal direction perpendicular thereto is defined as the Y direction, and the perpendicular direction perpendicular to both these directions The direction is described as the Z direction.

  In FIG. 1, reference numeral 1 denotes a member on a vibration generating part (for example, engine) side that connects one end side of the torque rod, and reference numeral 2 denotes a suspension member in this example as a vibration transmission side member. Reference numeral 3 denotes a torque rod that connects the vibration generating side member 1 and the vibration transmitting side member 2. In the illustrated example, the vibration generating side member 1 is a bracket having a cylindrical shaft portion. By fastening the bracket to the vibration generating portion, the torque rod 3 connects the vibration generating portion and the vibration transmitting side member 2 to each other. Link. Here, although the vibration generating side member 1 is shown as a separate member from the vibration side generating portion, both of them can be integrated.

Further, in the illustrated example, the vibration transmission side member 2 includes a box body 2a having an upper end opening surrounding the bottom wall with a side wall rising from the bottom wall, and a lid body 2b covering the upper end opening of the box body 2a. The box 2a and the lid 2b are securely fixed or fixed by fastening members such as bolts or welding. Further, a rectangular insertion opening 2c that allows insertion of the elastic member 3c of the torque rod 3 is formed on one side wall of the box 2a. Here, the dimension of the gap between the bottom wall 2a ₁ of the box 2a and the lid 2b is L ₁ , the dimension in the longitudinal direction (Y direction) of the insertion opening 2c is L ₂ , and the lateral direction (Z direction). When the dimension is L ₃ , these dimensions satisfy the relationship of L ₃ ≦ L ₁ <L ₂ . Note that the structure of the vibration transmission side member 2 here is not limited to the box body and the lid body, and for example, a spacer is disposed between a pair of plates spaced at a predetermined interval in the Z direction in the figure, Both may be fixed or fixed by fastening members, welding, or the like, and the gap between the plates may function as an insertion opening of the elastic member 3c of the torque rod 3, or the two facing each other at intervals. It is also possible to employ various configurations in which two members are fixed to each other and the elastic member 3c of the torque rod 3 can be inserted between the two members.

By the way, the torque rod 3 is provided with an elastic member 3b connected to the vibration generating side member 1 at one end on the axis of the torque rod main body 3a, and connected to the vibration transmitting side member 2 at the other end. The elastic member 3c is provided. In the place shown in FIG. 2, the elastic member 3b is provided with a hole inside thereof, and the vibration generating side member 1 shown in FIG. 1 can be inserted into this hole. In addition, the elastic member 3c may have a rigid support member 3d embedded therein. In the example shown in FIG. 2, and to form a resilient member 3c with two elastic portions 3c _1, the torque rod main body itself, by projecting the two rigid support portion 3d ₁ constituting the rigid support member 3d , each resilient portion 3c _1, it by fitting the previously provided with center holes in the rigid support portion 3d _1, are embedded rigid support member 3d in the elastic member 3c.

Here, the vertical and horizontal maximum dimensions of the elastic member 3c in front view from the shaft end side of the torque rod 3 are made different from each other. FIG. 3 is a front view of the elastic member 3c from the right end side of the torque rod 3, and the direction (Z direction) in which the two elastic portions 3c ₁ are arranged in series is the vertical direction of the elastic member 3c. orthogonal direction (Y direction) is a lateral direction of the elastic member 3c and the vertical maximum dimension L ₄ of is longer than the maximum dimension L ₅ lateral. The vertical maximum dimension L ₄ is longer than the gap dimension L ₁ of the vibration transmission side member 2 between the bottom wall 2a ₁ and the lid 2b shown in FIG.

In connecting the torque rod 3 having the above structure to the vibration transmission side member 2, first, as shown in FIG. 4A, the torque rod 3 is connected to the insertion opening 2c in the longitudinal direction of the elastic member 3c. The elastic member 3c is inserted into the vibration transmission side member 2 through the insertion opening 2c as a posture oriented in the longitudinal direction. At this time, since the dimensions L ₂ and L ₃ of the insertion opening 2c are longer than the dimensions L ₄ and L _{5 of the} elastic member 3c, respectively, insertion is not hindered. Next, as shown in FIG. 4B, the elastic member 3c is brought into a posture in which the elastic member 3c is rotationally displaced by 90 ° around the axis of the torque rod 3 from the posture shown in FIG. In this case, since the vertical maximum dimension L ₄ of the elastic member 3 c is longer than the gap dimension L ₁ of the vibration transmission side member 2, the elastic member 3 c is compressed using the bottom wall 2 a ₁ and the lid 2 b as a clamping member. Since it is deformed, the vibration transmission side member 2 and the torque rod 3 can be connected under frictional engagement between them. Here, the torque rod 3, when inserted into the vibration transmitting member 2, at least one of the bottom wall 2a ₁ and the lid 2b, abuts the elastic member 3c at reaching a predetermined depth of the elastic member 3c When a step portion for preventing further insertion of the torque rod 3 is provided, since the position of the torque rod 3 in the axial direction is specified by the insertion until the torque rod 3 abuts, the connecting operation is easier. It becomes.

As shown in the figure, when the rigid support member 3d is embedded in the elastic member 3c, the escape deformation of the elastic member 3c when the torque rod 3 is rotated as shown in FIG. 4B is restrained. Therefore, the required rotational displacement can be easily and reliably performed by the elastic member 3c. Moreover Here, the rigid support member 3d as shown in FIG. 3, the rod body portion 3a protruding length L ₆ comprising, by variously changing the width L _7, since the amount of deflection of the elastic member 3c can be adjusted, the torque rod Adjustment of the spring constant is also facilitated.

  Here, the elastic member 3c is preferably self-lubricating rubber. As a result, the sliding resistance between the elastic member 3c and the clamping member when the elastic member 3c is rotated by 90 ° around the axis of the torque rod 3 is reduced, so that the force required for the rotational displacement is reduced. Become. Also, when a groove is formed on the contact surface of the elastic member 3c with the holding member, the sliding resistance between the elastic member 3c and the holding member can be reduced, so that the rotational displacement is facilitated.

Further, FIG. 4 (a), the (b), the dimension L ₃ in the lateral direction of the insertion opening 2c is shorter than the dimension L ₁ of the gap between the bottom wall 2a ₁ and the lid body 2b Since the edge 2c ₁ formed around the insertion opening 2c is engaged with the elastic member 3c having a rotational posture as shown in FIG. 4 (b) and serves as a stopper, the torque rod 3 Can be reliably prevented from coming out of the vibration transmission side member 2.

Further, as shown in FIG. 5, for example, an elastic member 3c, instead of the two elastic portions 3c ₁ as a single elastic member 3c _2, block 4 superposed three plates 4 a to 4 c, the vibration transmission side The elastic member 3c ₂ may be inserted into the block 4 so as to be attached to the member 2 and may be engaged by being compressed and deformed.
Here, the plate 4a is provided with a through hole 4a ₁ corresponding to the insertion opening 2c, and the through hole 4a ₁ has a shape corresponding to the elastic member 3c ₂ as shown in FIG. 6 (a). there are, dimension L ₂ and dimensions L ₃ of the lateral direction (Z-direction) in the longitudinal direction (Y direction), is somewhat longer than the dimension L _4, L ₅ in the Y direction and the Z direction of the elastic member 3c, respectively The elastic member 3c ₂ can be freely inserted.
The plate 4b is provided with a through hole 4b ₁ connected in series from the through-hole 4a _1, the through hole 4b _1, as shown in FIG. 6 (b), the maximum dimension in the Y direction be L ₂ Since the maximum dimension in the Z direction is L ₁ and this dimension L ₁ is shorter than the dimension L _{4 of} the elastic member 3c, the hole wall with the elastic member 3c ₂ facing the Z direction of the through hole 4b ₁ is used. It can be held between each other. Therefore, here, the plate 4b constitutes a clamping member. Here the thickness T of the plate 4b is either substantially the same as the thickness t of the elastic member 3c _2, it is slightly larger.
In addition, the plate 4c, which serves as a contact stopper when the elastic member 3c is inserted, has a plate-like shape that does not have a hole through which the elastic member 3c ₂ is inserted in a portion corresponding to the through hole 4b _1. It has become.

In order to hold the elastic member 3c ₂ on the plates 4a to 4c configured as described above, the elastic member 3c ₂ is inserted into the through hole 4a ₁ in the posture shown in FIG. When the insertion is continued, the elastic member 3c ₂ comes into contact with the plate 4c via the through hole 4b ₁ . When the elastic member 3c ₂ is rotated and displaced by 90 ° in the arrow direction (clockwise) shown in FIG. 6B with the axis of the torque rod 3 as the center, the elastic member 3c ₂ is provided in the through hole 4b ₁ . and reaches the stepped portion 4b ₃ the stepped portion 4b ₂ beyond, is sandwiched by a pair of walls 4b ₄ serving as a clamping member, is held in a compressed deformed state. At this time, the elastic member 3c ₂ is the stepped portion 4b ₂ and the step portion 4b ₃ will be located between each other and the plate 4a as a pull direction of the stopper of the torque rod 3, further plate 4c is the inserting direction Since it functions as a stopper, it can be positioned not only in the X direction but also in the Y direction and the Z direction.

Even in the case of the other embodiment shown in FIG. 5, the rigid support member embedded in the elastic member 3c ₂ (in the example of FIGS. 5 and 6, the torque rod body 3a is also used) Since the bending amount of the elastic member 3c ₂ can be adjusted by variously changing the longitudinal direction (Z direction) length L ₆ and the lateral direction (Y direction) length L ₇ shown in FIG. It is easy to adjust the spring constant. Further, when the elastic member 3c ₂ is made of self-lubricating rubber or a groove is formed on the contact surface of the elastic member 3c ₂ with the wall portion 4b ₄ , the torque rod 3 is attached in the same manner as in the above example. The sliding resistance at the time of rotational displacement can be reduced.

DESCRIPTION OF SYMBOLS 1 Vibration generation side member 2 Vibration transmission side member 2a Box 2b Lid 2c Insertion opening 3 Torque rod 3a Torque rod main-body part 3b Elastic member 3c Elastic member 3d Rigid support member 4 Block 4a Plate 4b Plate 4c Plate

Claims (4)

A torque rod coupling structure in which one of elastic members provided at both ends is coupled to a vibration generation side member and the other is coupled to a vibration transmission side member,
The vertical and horizontal maximum dimensions of the outer contour line of one of the two elastic members arranged on the axis of the torque rod in the front view from the shaft end side are made different from each other, and the elastic members are connected. The connecting side member is provided with an insertion opening for the elastic member,
In a posture in which the elastic member inserted through the insertion opening is rotated and displaced by 90 ° around the axis of the torque rod, the elastic member is placed on the long side of the maximum longitudinal and lateral dimensions of the connecting side member. A torque rod coupling structure in which a pair of clamping members provided with a dimension shorter than the dimension is engaged under compression deformation.   The torque rod coupling structure according to claim 1, wherein a rigid support member is embedded in an elastic member having different vertical and horizontal maximum dimensions.   The torque according to claim 1 or 2, wherein the insertion opening is provided with an edge portion as a retaining stopper that engages with an elastic member having a different vertical and horizontal maximum dimension in a rotationally displaced torque rod posture. Connecting structure of rods. A torque rod coupling method using the torque rod coupling structure according to any one of claims 1 to 3,
An elastic member having a different maximum vertical and horizontal dimension of the torque rod is inserted into the insertion opening having a dimensional difference between the opening width and the opening length, and then the torque rod is moved around the axis. A connecting method of the torque rod, wherein the elastic member is engaged with the holding member under a compression change by rotating the member 90 degrees to 90 °.